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Thats awsome. what did you do cut the shaft and use a pice of another one to act as a sliding sleve? how is the engagment well its out crawling? how did you get down through the frame and where?

Thanks. A saw. I used a female an two male driveshafts. It is smooth if lubed but other wise it needs some help from the driveline moving. I drilled like 5 holes in a line the used a dremal to make it one big one.

Dig would be a good mod to have in the summit. I wonder if you could pull it off with the use of one of the locking diffs inline with the rear driveshaft i.e. digDiff. With the digDiff locked you're in 4x4 with the digDiff unlocked you'd have dig. The key would be to figure out how to lock the driveshaft to the rear diff when you unlocked the digDiff. Maybe you could turn the coupling around inside the locking diff to lock against the diff housing when unlocked:

I actually took the time and did this mod on mine. Sadly it didnt help like it does on the superclass crawlers. The truck is too heavy and when you go into front dig on a verticle climb it cant pull it up. Kick in the rear axle again and it just flips over like normal.. The only thing that was cool about it was doing front dig turns. Flooring it in front wheel drive it would spin around nicely in a tight spot. Needless to say, I removed the mod from my truck, too many moving parts to not use. Just my experience with it.